If you have flaking chrome (not clearcoat, but the actual chrome) or pits (where rust has eaten through the chrome) in the metal, then no, it won't be easily restored (restorating being like new).

I think that wheel will clean up ok. Just use some aircraft stripper and get the old clear coat off, then respray it with clear coat or leave it bare chrome. From what I can see in the pics that looks to be in good shape, so should clean up well.

One set of mine looked like yours, and they cleaned up great. The other set I had some minor rust pits around the inner ring, and they still look good, but I have to peridically clean them up again as once you get pits in the surface they will rust again.

I agree with wm69. Those appear to be in great condition. The clear on these wheels tend to flake and yellow over the years which can be very unflattering to the eye.
Take some air craft remover and get the current clear off of them.
DO NOT GET LAZY AND PULL OUT THE PRESSURE WASHER!!! I did this with a set that I had and peeled off a good portion of the chrome plating. The thing is, I couldn't see any signs of the chrome peeling prior to pulling out the pressue washer.
Anyways, make sure you look over the wheels. If you're buying them from some yahoo on the other side of the country, make sure you get pictures of all the wheels with close ups so you can see if they are starting to pepper or have any rust. I was taken by a fellow site members for close to 9 bills for the set I currently have. I have since licked my wounds, but will be ready at anytime to put a boot up this kids azz if I ever see him in person....